405853481 has 24 divisors (see below), whose sum is σ = 461228040. Its totient is φ = 356590080.

The previous prime is 405853477. The next prime is 405853493. The reversal of 405853481 is 184358504.

It can be written as a sum of positive squares in 4 ways, for example, as 22477081 + 383376400 = 4741^2 + 19580^2 .

It is not a de Polignac number, because 405853481 - 2² = 405853477 is a prime.

It is a super-2 number, since 2×405853481² = 329434096079634722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (405853411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1204145 + ... + 1204481.

It is an arithmetic number, because the mean of its divisors is an integer number (19217835).

Almost surely, 2^405853481 is an apocalyptic number.

It is an amenable number.

405853481 is a deficient number, since it is larger than the sum of its proper divisors (55374559).

405853481 is a wasteful number, since it uses less digits than its factorization.

405853481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 405853481 is about 20145.8055435865. The cubic root of 405853481 is about 740.3829774365.

The spelling of 405853481 in words is "four hundred five million, eight hundred fifty-three thousand, four hundred eighty-one".